iPhone app rtl_tcp SDR

An RTL-SDR Software Defined Radio receiver app for iOS devices.
Listen to AM, FM, SSB and CW radio signals.
View an RF spectrum and waterfall.
Connect, via the rtl_tcp network protocol, to networked RTL-SDR USB peripherals.

This app requires an external rtl_tcp server.
iOS devices do not currently support the direct connection of USB peripherals such as an RTL-SDR.
Thus, the use of this app requires network access to a server, such as a Raspberry Pi (or Mac), with an RTL-SDR unit plugged into its USB port, and running the rtl_tcp protocol at an TCP/IP network address accessible from your iOS device.
This allows a Raspberry Pi (or Mac) to act, essentially, as the USB port adapter for your iOS device.
The rtl_tcp SDR app can also connect to hfp_tcp for the Airspy HF+, rsp_tcp for SDRPlay devices, and lmm_tcp for the LimeSDR Mini; see GitHub for server source code.
This app can also connect directly to a networked Hermes Lite 2 QRP SDR transceiver, no server required.

No support is provided for installing any of the rtl_tcp or other tcp software needed to use this app (with a Raspberry Pi, or otherwise).
Please do not download this app unless you are already familiar with Software Defined Radio, have an RTL-SDR or equivalent USB SDR peripheral, and have already installed and tested rtl_tcp on your Raspberry Pi, Mac, or other server.
Note that this app requires a very high bandwidth network connection in order to receive streams of real-time RF samples from an RTL-SDR.
It is recommended that your rtl_tcp server be on a wired connection rather than on the same WiFi as your iOS device.,

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